Найти область определения функции:
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{x³-x≥0⇒x(x-1)(x+1)≥0⇒-1≤x≤0 U x≥1
{x-3≠0⇒x≠3
             _                  +                   _                  +
----------------[-1]-------------[0]---------------[1]-----------------(3)----------
x∈[-1;0] U [1;3) U (3;∞)

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